Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Control system for permanent magnet synchronous motor










Image Number 14 for United States Patent #5854547.

To provide a control system for a permanent magnet synchronous motor which can ensure stability of the current control system, even if the revolution frequency of the motor becomes higher and the terminal voltage of the motor exceeds the inverter maximum output voltage. In this method, when the revolution frequency of the motor exceeds a specified value, the size of the voltage vector is made a specified voltage vector, and a modulation factor based on its value is obtained. At the same time, a magnetic flux direction current correction value is found based on the size of a voltage vector from a polarity coordinates conversion unit and the above specified voltage vector size. Then, the magnetic flux direction current instruction is corrected by that value.








 
 
  Recently Added Patents
Lipoprotein analysis by differential charged-particle mobility
Light irradiation element, image forming structure, and image forming apparatus
Intralevel conductive light shield
Methods, systems, and media for swapping faces in images
Specializing disambiguation of a natural language expression
Method for computing an energy efficient route
Engineered nucleic acids encoding a modified erythropoietin and their expression
  Randomly Featured Patents
Aqueous formaldehyde textile finishing process
Phasor transducer apparatus and system for protection, control, and management of electricity distribution systems
Four-wheel vehicle drive system
Centering system
Double-locking mount for arrow quiver
Lamp
Eyeball examining device
Liquid crystal display device, and manufacturing method for the liquid crystal display device
Nail treatment composition comprising hydroxy carboxylic acid
Priming means for bow steering pumps